PowerEdge: H965i: Slimline Cable Errors and Slimline Connected to an Unpowered Device Error
Summary: PowerEdge RAID Controller (PERC) H965i Part Number 3KWJN Revision A05 may intermittently stop on post, reporting HWC8010 and UEFI0116. The Lifecycle Log (LC) log may also record an SWC5012 error stating, Unable to power on the host because a slimline cable is connected to an unpowered device. ...
Symptoms
Cable configurations are only checked when AC power is applied and are not re-evaluated during soft reboots or soft power cycles.
Voltage sensitivity can result in false HWC8010 Slimline cable errors and SWC5012 Slimline Device not Powered errors during system power-up or power cycling.
This condition is observable intermittently.
POST Error Screenshot:
HWC8010: The System Configuration Check operation resulted in the following issues: Config Missing.

LC log:
SWC5012: Unable to power on the host because a slimline cable is connected to an unpowered device.
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Cause
Voltage variances during cable detection
Resolution
Fix:
Update the iDRAC firmware version to 7.10.50.00 (expected availability June 2024) to resolve this issue.
Workaround:
Removing and reapplying AC power (or using the iDRAC AC power cycle) can temporarily mitigate the errors.